Image:1r9fTRUBIOUNIT.pdb

biological unit of 1r9f from http://www.rcsb.org/pdb/files/1R9F.pdb1.gz (REMOVED THE MODEL NUMBERS AND SECOND RNA and made second A chain D using a python script (SEE BELOW) When I uploaded it to the script authoring tool, one of the proteins chains had lost its information on whether it was helix or sheet and just showed as a long noodle when viewing as cartoon. Entering in the Jmaol console 'calculate structure' and then redoing cartoon back in script authoring tool fixed it.

From the PDB "Data files contained in the PDB archive (ftp://ftp.wwpdb.org) are free of all copyright restrictions and made fully and freely available for both non-commercial and commercial use. "

Python script: pdb = open("part.pdb", "r")

for line in pdb: if line[:4] == 'ATOM': print line [:21] + "D" + line [22:-1]